In Salah climate — normals and trends
In Salah (Algeria) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 25.6 °C and it receives 12 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (37.2 °C on average) and the coldest is January (12.9 °C). Rainfall peaks in January.
In Salah averages 1 frost days, 212 hot days (≥ 30 °C) and 3 rainy days per year.
In Salah has warmed by +3.3 °C between 1940 and 2025, or +0.38 °C per decade. This trend is statistically significant.
The number of frost days there went from about 3 to 0 per year over the period.
The hottest day of the period reached 49.0 °C (on 12 July 2002) and the coldest -6.0 °C (on 9 January 1945).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
In SalahIn Salah
- coords
- 27.20°, 2.48°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.6°C
Average daily high
32.3°C
Average daily low
18.4°C
Annual rainfall
12mm
Sunshine / day
11.3h
Mean relative humidity
24%
Average peak wind
25.6km/h
Seasonal range
24.3°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
212 d/yr
Rainy days (≥ 1 mm)
3 d/yr
Annual snowfall
0.0 cm
Average feels-like high
28.8 °C
Average feels-like low
13.9 °C
Average peak gust
40.3 km/h
Tropical nights (≥ 20 °C)
169 d/yr
Solar radiation
22.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.3 °C
since 1940
+0.4 °C per decade · r² = 0.78 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
49.0 °C
12 July 2002
Coldest day
-6.0 °C
9 January 1945
Wettest day
18 mm
4 April 2019
Windiest day
64.2 km/h
1 April 2016
Strongest gust
97.2 km/h
1 April 2016
Hottest feels-like
49.3 °C
9 July 2005
Coldest feels-like
-10.4 °C
9 January 1945
Sunniest day
13.4 h
17 June 1942
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 21.8 °C | +2.1 °C | 0 mm | -3 mm |
| Feb | 23.2 °C | +0.2 °C | 0 mm | -1 mm |
| Mar | 30.0 °C | +2.5 °C | 6 mm | +5 mm |
| Apr | 34.0 °C | +1.7 °C | 0 mm | -1 mm |
| May | 37.7 °C | +0.6 °C | 0 mm | +0 mm |
| Jun | 41.7 °C | -0.3 °C | 0 mm | -0 mm |
| Jul | 44.4 °C | +0.7 °C | 0 mm | -0 mm |
| Aug | 43.5 °C | +0.7 °C | 0 mm | -0 mm |
| Sep | 40.7 °C | +1.3 °C | 1 mm | -0 mm |
| Oct | 35.9 °C | +2.8 °C | 0 mm | -1 mm |
| Nov | 28.1 °C | +2.2 °C | 0 mm | -1 mm |
| Dec | 20.6 °C | +0.1 °C | 2 mm | -1 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of In Salah?
In Salah has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 25.6 °C and it receives 12 mm of precipitation per year.
What is the hottest day ever recorded in In Salah?
The hottest day measured in In Salah between 1940 and 2025 was 12 July 2002, reaching 49.0 °C.
What is the coldest day in In Salah?
The coldest day measured in In Salah between 1940 and 2025 was 9 January 1945, at -6.0 °C.
Does it snow in In Salah?
Almost never: In Salah sees virtually no snow, with about 1 frost days per year.
Has the climate of In Salah warmed?
Yes: In Salah warmed by +3.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in In Salah?
The wettest day measured in In Salah between 1940 and 2025 was 4 April 2019, with 18 mm of rain in 24 hours.
What was the windiest day in In Salah?
The windiest day measured in In Salah between 1940 and 2025 was 1 April 2016, with winds reaching 64.2 km/h.
What is the warmest month in In Salah?
The warmest month in In Salah is July (37.2 °C on average); the coldest is January (12.9 °C).
How much does it rain in In Salah?
In Salah receives on average 12 mm of precipitation per year, spread over about 3 rainy days.
Is it sunny in In Salah?
In Salah gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
Are there tropical nights in In Salah?
Yes: In Salah has on average 169 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in In Salah?
In In Salah, between 1940 and 2025, the highest apparent temperature reached 49.3 °C on 9 July 2005, and the lowest was -10.4 °C on 9 January 1945.
Compare In Salah with another city
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Nearby cities
The climate around In Salah